Multiple reftests were damaged by the element name transition. Repair them. The region reftests are no longer needed, since we no longer do regions.
Fixes reftests. https://bugzilla.gnome.org/show_bug.cgi?id=750605
This fixes shadows that are animated not updating the clip of the widget they are drawn on. An example of this are the buttons in the CSS shadows example in gtk-demo. Reftest included
